| Characteristic | All subjects | Pulmonary exacerbation baseline status at visit 1 | ||
| None | Mild | Severe | ||
| Subjects n | 94 | 60 | 15 | 19 |
| Age yrs | 28.5±8.2 | 28.1±7.6 | 30.4±8.7 | 28.1±9.7 |
| Male | 48 (51.1) | 34 (56.7) | 8 (53.3) | 6 (31.6) |
| Employment status | ||||
| Full-time | 9 (9.6) | 6 (10.0) | 0 (0.0) | 3 (15.8) |
| Part-time | 1 (1.1) | 0 (0.0) | 0 (0.0) | 1 (5.3) |
| Homemaker | 6 (6.4|) | 3 (5.0) | 2 (13.3) | 1 (5.3) |
| Student | 50 (53.2) | 36 (60.0) | 6 (40.0) | 8 (42.1) |
| Retired | 4 (4.3) | 2 (3.3) | 0 (0.0) | 2 (10.5) |
| Disabled/unable to work due to health | 21 (22.3) | 11 (18.3) | 6 (40.0) | 4 (21.1) |
| Other | 3 (3.2) | 2 (3.3) | 1 (6.7) | 0 (0.0) |
| FEV1 % pred | ||||
| Subjects n | 90 | 58 | 14 | 18 |
| Mean±sd | 58.7±26.8 | 65.9±27.5 | 51.9±21.9 | 41.0±17.8 |
| Median | 54.9 | 68.4 | 46.0 | 38.7 |
Data are presented as mean±sd or n (%), unless otherwise stated. FEV1: forced expiratory volume in 1 s; % pred: % predicted. #: socio-demographic information was obtained using the Cystic Fibrosis Questionnaire-Revised at visit 1 unless data was missing, in which case it was imputed from other data sources.